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Finding the Fourth Proportional to 101,135.50, 139,567.05 and 56,423.50

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Solution

The fourth proportional to 101,135.50, 139,567.05 and 56,423.50 is: 77,864.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,135.50 : 139,567.05 = 56,423.50 : x
  2. Step 2: Convert to fraction form
    101,135.50/139,567.05 = 56,423.50/x
  3. Step 3: Cross multiply
    101,135.50x = 139,567.05 × 56,423.50
  4. Step 4: Simplify right side
    101,135.50x = 7,874,861,445.68
  5. Step 5: Solve for x
    x = 7,874,861,445.68/101,135.50
  6. Step 6: Final answer
    x = 77,864.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.